/// <summary>
/// Writes the schema information in an XML format to a byte stream. The stream is closed by this method.
/// </summary>
public void SaveAsXml(ISystemContext context, Stream ostrm, bool keepStreamOpen)
{
XmlWriterSettings settings = new XmlWriterSettings();
settings.Encoding = Encoding.UTF8;
settings.CloseOutput = !keepStreamOpen;
settings.ConformanceLevel = ConformanceLevel.Document;
settings.Indent = true;
ServiceMessageContext messageContext = new ServiceMessageContext();
messageContext.NamespaceUris = context.NamespaceUris;
messageContext.ServerUris = context.ServerUris;
messageContext.Factory = context.EncodeableFactory;
using (XmlWriter writer = XmlWriter.Create(ostrm, settings)) {
XmlQualifiedName root = new XmlQualifiedName("ListOfNodeState", Namespaces.OpcUaXsd);
XmlEncoder encoder = new XmlEncoder(root, writer, messageContext);
encoder.SaveStringTable("NamespaceUris", "NamespaceUri", context.NamespaceUris);
encoder.SaveStringTable("ServerUris", "ServerUri", context.ServerUris);
for (int ii = 0; ii < this.Count; ii++)
{
NodeState state = this[ii];
if (state != null)
{
state.SaveAsXml(context, encoder);
}
}
encoder.Close();
}
}
/// <summary>
/// Convert encodeable to xml
/// </summary>
/// <param name="encodeable"></param>
/// <param name="context"></param>
/// <returns></returns>
public static XmlElement AsXmlElement(this IEncodeable encodeable,
IServiceMessageContext context)
{
#pragma warning disable IDE0067 // Dispose objects before losing scope
var encoder = new XmlEncoder(context);
#pragma warning restore IDE0067 // Dispose objects before losing scope
encoder.WriteExtensionObjectBody(encodeable);
var document = new XmlDocument {
InnerXml = encoder.Close()
};
return(document.DocumentElement);
}
/// <summary>
/// Convert encodeable to xml
/// </summary>
/// <param name="encodeable"></param>
/// <param name="context"></param>
/// <returns></returns>
public static XmlElement AsXmlElement(this IEncodeable encodeable,
ServiceMessageContext context)
{
var encoder = new XmlEncoder(context);
encoder.WriteExtensionObjectBody(encodeable);
var document = new XmlDocument {
InnerXml = encoder.Close()
};
return(document.DocumentElement);
}
/// <summary>
/// Encodes the object in XML.
/// </summary>
public static XmlElement EncodeXml(IEncodeable encodeable, ServiceMessageContext context)
{
// create encoder.
XmlEncoder encoder = new XmlEncoder(context);
// write body.
encoder.WriteExtensionObjectBody(encodeable);
// create document from encoder.
XmlDocument document = new XmlDocument();
document.InnerXml = encoder.Close();
// return root element.
return(document.DocumentElement);
}
private async void MonitoredItem_Notification(MonitoredItem monitoredItem, MonitoredItemNotificationEventArgs e)
{
if (e.NotificationValue == null)
{
return;
}
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
try
{
XmlEncoder encoder = new XmlEncoder(monitoredItem.Subscription.Session.MessageContext);
e.NotificationValue.Encode(encoder);
ServerStatusTB.Text = encoder.Close();
}
catch (Exception ex)
{
Utils.Trace(ex, "Error processing monitored item notification.");
}
});
}
/// <summary>
/// Adds a node to the set.
/// </summary>
public void Export(ISystemContext context, NodeState node, bool outputRedundantNames = true)
{
if (node == null)
{
throw new ArgumentNullException(nameof(node));
}
if (Opc.Ua.NodeId.IsNull(node.NodeId))
{
throw new ArgumentException("A non-null NodeId must be specified.");
}
UANode exportedNode = null;
switch (node.NodeClass)
{
case NodeClass.Object:
{
BaseObjectState o = (BaseObjectState)node;
UAObject value = new UAObject();
value.EventNotifier = o.EventNotifier;
if (o.Parent != null)
{
value.ParentNodeId = ExportAlias(o.Parent.NodeId, context.NamespaceUris);
}
exportedNode = value;
break;
}
case NodeClass.Variable:
{
BaseVariableState o = (BaseVariableState)node;
UAVariable value = new UAVariable();
value.DataType = ExportAlias(o.DataType, context.NamespaceUris);
value.ValueRank = o.ValueRank;
value.ArrayDimensions = Export(o.ArrayDimensions);
value.AccessLevel = o.AccessLevelEx;
value.MinimumSamplingInterval = o.MinimumSamplingInterval;
value.Historizing = o.Historizing;
if (o.Parent != null)
{
value.ParentNodeId = ExportAlias(o.Parent.NodeId, context.NamespaceUris);
}
if (o.Value != null)
{
XmlEncoder encoder = CreateEncoder(context);
Variant variant = new Variant(o.Value);
encoder.WriteVariantContents(variant.Value, variant.TypeInfo);
XmlDocument document = new XmlDocument();
document.InnerXml = encoder.Close();
value.Value = document.DocumentElement;
}
exportedNode = value;
break;
}
case NodeClass.Method:
{
MethodState o = (MethodState)node;
UAMethod value = new UAMethod();
value.Executable = o.Executable;
if (o.TypeDefinitionId != null && !o.TypeDefinitionId.IsNullNodeId && o.TypeDefinitionId != o.NodeId)
{
value.MethodDeclarationId = Export(o.TypeDefinitionId, context.NamespaceUris);
}
if (o.Parent != null)
{
value.ParentNodeId = ExportAlias(o.Parent.NodeId, context.NamespaceUris);
}
exportedNode = value;
break;
}
case NodeClass.View:
{
ViewState o = (ViewState)node;
UAView value = new UAView();
value.ContainsNoLoops = o.ContainsNoLoops;
exportedNode = value;
break;
}
case NodeClass.ObjectType:
{
BaseObjectTypeState o = (BaseObjectTypeState)node;
UAObjectType value = new UAObjectType();
value.IsAbstract = o.IsAbstract;
exportedNode = value;
break;
}
case NodeClass.VariableType:
{
BaseVariableTypeState o = (BaseVariableTypeState)node;
UAVariableType value = new UAVariableType();
value.IsAbstract = o.IsAbstract;
value.DataType = ExportAlias(o.DataType, context.NamespaceUris);
value.ValueRank = o.ValueRank;
value.ArrayDimensions = Export(o.ArrayDimensions);
if (o.Value != null)
{
XmlEncoder encoder = CreateEncoder(context);
Variant variant = new Variant(o.Value);
encoder.WriteVariantContents(variant.Value, variant.TypeInfo);
XmlDocument document = new XmlDocument();
document.InnerXml = encoder.Close();
value.Value = document.DocumentElement;
}
exportedNode = value;
break;
}
case NodeClass.DataType:
{
DataTypeState o = (DataTypeState)node;
UADataType value = new UADataType();
value.IsAbstract = o.IsAbstract;
value.Definition = Export(o, o.DataTypeDefinition, context.NamespaceUris, outputRedundantNames);
value.Purpose = o.Purpose;
exportedNode = value;
break;
}
case NodeClass.ReferenceType:
{
ReferenceTypeState o = (ReferenceTypeState)node;
UAReferenceType value = new UAReferenceType();
value.IsAbstract = o.IsAbstract;
if (!Opc.Ua.LocalizedText.IsNullOrEmpty(o.InverseName))
{
value.InverseName = Export(new Opc.Ua.LocalizedText[] { o.InverseName });
}
value.Symmetric = o.Symmetric;
exportedNode = value;
break;
}
}
exportedNode.NodeId = Export(node.NodeId, context.NamespaceUris);
exportedNode.BrowseName = Export(node.BrowseName, context.NamespaceUris);
if (outputRedundantNames || node.DisplayName.Text != node.BrowseName.Name)
{
exportedNode.DisplayName = Export(new Opc.Ua.LocalizedText[] { node.DisplayName });
}
else
{
exportedNode.DisplayName = null;
}
if (node.Description != null && !String.IsNullOrEmpty(node.Description.Text))
{
exportedNode.Description = Export(new Opc.Ua.LocalizedText[] { node.Description });
}
else
{
exportedNode.Description = new LocalizedText[0];
}
exportedNode.Category = (node.Categories != null && node.Categories.Count > 0) ? new List <string>(node.Categories).ToArray() : null;
exportedNode.ReleaseStatus = node.ReleaseStatus;
exportedNode.WriteMask = (uint)node.WriteMask;
exportedNode.UserWriteMask = (uint)node.UserWriteMask;
exportedNode.Extensions = node.Extensions;
if (!String.IsNullOrEmpty(node.SymbolicName) && node.SymbolicName != node.BrowseName.Name)
{
exportedNode.SymbolicName = node.SymbolicName;
}
// export references.
INodeBrowser browser = node.CreateBrowser(context, null, null, true, BrowseDirection.Both, null, null, true);
List <Reference> exportedReferences = new List <Reference>();
IReference reference = browser.Next();
while (reference != null)
{
if (node.NodeClass == NodeClass.Method)
{
if (!reference.IsInverse && reference.ReferenceTypeId == ReferenceTypeIds.HasTypeDefinition)
{
reference = browser.Next();
continue;
}
}
Reference exportedReference = new Reference();
exportedReference.ReferenceType = ExportAlias(reference.ReferenceTypeId, context.NamespaceUris);
exportedReference.IsForward = !reference.IsInverse;
exportedReference.Value = Export(reference.TargetId, context.NamespaceUris, context.ServerUris);
exportedReferences.Add(exportedReference);
reference = browser.Next();
}
exportedNode.References = exportedReferences.ToArray();
// add node to list.
UANode[] nodes = null;
int count = 1;
if (this.Items == null)
{
nodes = new UANode[count];
}
else
{
count += this.Items.Length;
nodes = new UANode[count];
Array.Copy(this.Items, nodes, this.Items.Length);
}
nodes[count - 1] = exportedNode;
this.Items = nodes;
// recusively process children.
List <BaseInstanceState> children = new List <BaseInstanceState>();
node.GetChildren(context, children);
for (int ii = 0; ii < children.Count; ii++)
{
Export(context, children[ii], outputRedundantNames);
}
}
private async void MonitoredItem_Notification(MonitoredItem monitoredItem, MonitoredItemNotificationEventArgs e)
{
if (e.NotificationValue == null)
{
return;
}
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal,() =>
{
try
{
XmlEncoder encoder = new XmlEncoder(monitoredItem.Subscription.Session.MessageContext);
e.NotificationValue.Encode(encoder);
ServerStatusTB.Text = encoder.Close();
}
catch (Exception ex)
{
Utils.Trace(ex, "Error processing monitored item notification.");
}
});
}